Venezuela-Colombia: what's behind the bad blood?

The bad blood continues between Colombia and Venezuela, with Chavez severing ties with his neighbour. We also take you to Brazil with a special report from Sao Paolo's favelas, where an organization has made it its mission to take over unoccupied property. And, we go to the US for a rather special wedding. Former President Bill Clinton led his daughter Chelsea down the aisle in a ceremony that spared no expense.